In PHP, we can use various methods to convert a string into an array of integers.
A common way is to use the explode()
function to split the string into arrays according to the specified delimiter, and then use the array_map()
function to split each Elements are converted to integer types. As shown below:
$str = '1,2,3,4,5'; $arr = explode(',', $str); $arr = array_map('intval', $arr);
Another way is to use regular expressions to extract the numbers in the string, and then use the array_map()
function to convert each number to an integer type. As shown below:
$str = 'abc123def456ghi789'; preg_match_all('/\d+/', $str, $matches); $arr = array_map('intval', $matches[0]);
You can also use the preg_split()
function to split the string into arrays according to regular expressions, and then use the array_map()
function to split each elements are converted to integer types. As shown below:
$str = 'a1b2c3d4e5'; $arr = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY); $arr = array_map('intval', $arr);
Another way is to use the str_split()
function introduced in PHP 7 to split the string into an array of individual characters and then use array_map( )
function converts each character to an integer type. As shown below:
$str = '12345'; $arr = str_split($str); $arr = array_map('intval', $arr);
No matter which method is used, the string can eventually be converted into an integer array, which facilitates our subsequent processing.
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